Knowing the trouble users face with unwanted/spam calls, Google has taken wise decision to develop an Android App to block unwanted calls. Number not in contacts or repeated call from numbers will be identified and tagged with red banner. If the user thinks that the call is spam, he simply clicks the banner and mark it as an unwanted/spam call. Till now, users are sorting to other mobile app creator to avail this functionality. Now, Google’s decision to develop an inbuilt app will make the users happy and block unwanted calls.